Method of making brake-shoe backs.



l. LEsH. METHOD OF MAKING BRAKE SHOE BACKS.

APPLICATION FILED AUG-25, I9I6.

5. Patented July 3, 1917.

2 SHEETS-SHEET 2.

IRA B. LESH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR' T'O THE RAILWAY MATERIALS COMPANY,` OF CHICAGO, ILLINOIS, A CORPORATION -OF ILLINOIS.

METHOD OF MAKING BRAKE-SHOE BACKS..

Application led August 25, 1916.

To all whom t may concern:

Be it known that I, IRA B. LnsH, a citizen of 'the United States, residing at Philadelphia, in the county of Philadelphia and btate of Pennsylvania, have invented certain new and useful Improvements in Methods of Making Brake-Shoe Backs, of which the following is a specification.

The obj ect of this invention is to provide a strong and substantial rolled steel back adapted to be embedded in the body of a brake shoe for reinforcing and strengthen,- ing the shoe and holding the parts of the body together in case of fracture.

The present invention consists in a novel method of making this brake shoe back which is claimed as an article of manufacture in a divisional application Serial No. 147,518 filed February 9, 1917.

Other objects of the invention will appear hereinafter in the detail description thereof in connection with the accompanying drawings, in which- Figure 1 is a longitudinal sectional elevation of a brake shoe embodying my in vention;

Fig. 2 is a top plan View of the shoe;

Fig. 3 is a side view of the reinforcing back and integral attaching lug;

Figs. Li and 5 are transverse sectional views on the lines 4 4: and 5 5 of Fig. 2;

Fig. 6 illustrates a section of rolled plate from which the back may be made;

Fig. 7 illustrates a further step in the formation of the back.

My invention can be embodied in car shoes, driver shoes, common cast iron, composite and composition shoes of all descriptions but for simplicity I have shown it in the drawings embodied in a shoe having a common cast iron body 12 provided with the usual end lugs 13 and guide lugs 14.

The back 15 is made of ductile metal, preferably steel, curved to conform to the usual curvature of the shoe body and it may be provided with upturned ends 16. The attaching lug 17 is made of suitable size and coniiguration with a key opening 18 and is rigid with the back, being preferably made integral with the back.

The back is embedded in the body of the shoe, at or adjacent to the back thereof,

Specicaton of Tietters Patent.

Patented July 3, 1917.

Serial No. 116,871.

when the body is cast and any suitable means common in the art for securing a rigid connection between the back and the body may be employed. For this purpose the back may be provided with openings 20 to permit the body metal to flow up therethrough and form keys for locking the back and body together.

The attaching lug is preferablv made of a size and shape to conform to the require ments of the Master Car Builders7 speciications and, being preferably made of steel integral with the back, it constitutes a strong and substantial solid lug which will not be broken in handling or in actual service. The attaching` lug is preferably of the proper height, length and width to t in a brake head and the key-way is located to register with the keyway in the brake head and receive the locking key.

The back with the integral lug may be made by rolling a plate 21 with a center rib 22 of the proper dimensions (Fig. 6), then shearing the plate transversely to provide a blank of the proper size for the back, (F ig. 7) forming a hole in the lug formed by the center rib to provide the key-way and bending the plate to the proper conformation. The openings in the back may be made at the same time that the plate is bent and the upturncd ends may be formed by rolling or by bending. The plate may be bent in rolling, if desired.

I am thus enabled to produce at low cost a back with an integral attaching lug of strong and substantial construction which will not be broken in handling or in service.

I claim:

1. The herein described method of making a one-piece steel back for a brake shoe which consists in rolling a section having a center rib on the upper face thereof, said center rib being of a size and shape to fit a brake head and said section being of substantially uniform thickness on both sides of said center rib, cutting a back blank from said section, and forming a keyway opening in the center rib extending in the direction of the length of the back blank.

2. The herein described method of making a one-piece steel back for a brake shoe which consists in rolling a section having a center rib and npstandingz,` edge ribs on the upper ing in the direction of the length of the baci( face thereof, said center rib being of a size blank.

and shape to t a brake head and said section being of substantially uniform thick- Y IRA B LESH' 5 ness onl both sides of said center rib, cutting Witnesses: Y

a Vback blank from said section, and forming FRANK BILLINSKI,

a keyway opening in the 'center' rib extend- WILLIAM FRICK.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

